DOI: 10.5194/hess-20-1509-2016
Scopus记录号: 2-s2.0-84965158897
论文题名: Stem-root flow effect on soil-Atmosphere interactions and uncertainty assessments
作者: Kuo T ; -H ; , Chen J ; -P ; , Xue Y
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2016
卷: 20, 期: 4 起始页码: 1509
结束页码: 1522
语种: 英语
Scopus关键词: Atmospheric movements
; Evaporation
; Heat flux
; Moisture
; Soil moisture
; Temperature
; Transpiration
; Atmospheric interaction
; Flow parameterization
; Mediterranean environment
; Moisture diffusion
; Plant transpiration
; Sensible heat flux
; Soil evaporations
; Uncertainty assessment
; Soils
; energy flux
; evaporation
; humid environment
; Mediterranean environment
; parameterization
; sensible heat flux
; soil moisture
; soil surface
; soil temperature
; transpiration
; uncertainty analysis
; France
; Taiwan
英文摘要: Rainfall that reaches the soil surface can rapidly move into deeper layers in the form of bulk flow through the stem-root flow mechanism. This study developed the stem-root flow parameterization scheme and coupled this scheme with the Simplified Simple Biosphere model (SSiB) to analyze its effects on land-Atmospheric interactions. The SSiB model was tested in a single-column mode using the Lien Hua Chih (LHC) measurements conducted in Taiwan and HAPEX-Mobilhy (HAPEX) measurements in France. The results show that stem-root flow generally caused a decrease in soil moisture in the top soil layer and moistened the deeper soil layers. Such soil moisture redistribution results in substantial changes in heat flux exchange between land and atmosphere. In the humid environment at LHC, the stem-root flow effect on transpiration was minimal, and the main influence on energy flux was through reduced soil evaporation that led to higher soil temperature and greater sensible heat flux. In the Mediterranean environment of HAPEX, the stem-root flow substantially affected plant transpiration and soil evaporation, as well as associated changes in canopy and soil temperatures. However, the effect on transpiration could be either positive or negative depending on the relative changes in the soil moisture of the top soil vs. deeper soil layers due to stem-root flow and soil moisture diffusion processes. © Author(s) 2016. CC Attribution 3.0 License. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78866
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Atmospheric Sciences, National Taiwan University, Taipei, Taiwan, China; Department of Atmospheric and Oceanic Sciences, Department of Geography, University of California, Los Angeles, CA, United States
Recommended Citation:
Kuo T,-H,, Chen J,et al. Stem-root flow effect on soil-Atmosphere interactions and uncertainty assessments[J]. Hydrology and Earth System Sciences,2016-01-01,20(4)